My understanding is that the rooms at the BC can be different sizes, with and without daybeds. I haven't been in a room with a daybed, so I am not sure if there is anything missing in those.
Maybe the desk/chair are missing- here is a picture of a room with a daybed.
For the rooms without daybeds, you can request a rollaway cot, which is free of charge, but from what I have read, some rooms will fit the cots better than others.
I think the rooms were refurbed in either 2008 or early 2009.